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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Three-dimensional graphene aerogel-supported iron oxide nanoparticles as an efficient adsorbent for magnetic solid phase extraction of organophosphorus pesticide residues in fruit juices followed by gas chromatographic determination
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Three-dimensional graphene aerogel-supported iron oxide nanoparticles as an efficient adsorbent for magnetic solid phase extraction of organophosphorus pesticide residues in fruit juices followed by gas chromatographic determination

机译：三维石墨烯气凝胶负载的氧化铁纳米颗粒作为一种有效的吸附剂，用于磁性固相萃取果汁中的有机磷农药残留，然后进行气相色谱测定

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In this research, a magnetic three dimensional-graphene nanocomposite (3D-G-Fe3O4) was prepared, characterized and used as an effective nanoadsorbent in magnetic solid-phase extraction (MSPE) of eight organophosphorus pesticides (OPPs) from juice samples prior to gas chromatography-nitrogen phosphorous detection (GC-NPD). The properties and morphology of 3D-G-Fe3O4 were characterized by scanning electron microscopy (SEM), Fourier transform-infrared spectroscopy (FT-IR) and vibrating sample magnetometry (VSM). The main experimental parameters affecting extraction recoveries including extraction time, amount of adsorbent, pH of sample solution, salt concentration and desorption conditions were carefully studied and optimized. The results showed wide linear concentration ranges with determination coefficients between 0.9973 and 0.9999. The limits of detection (S/N = 3) of the method and limits of quantification (S/N = 10) were from 1.2 to 5.1 ng L-1 and 3.4-17.0 ng L-1, respectively. The intra-day and inter-day RSDs were 2.6-5.1% and 3.5-6.9%, respectively. The method was successfully applied to the analysis of OPPs in fruit juices (apple, orange, grape, sour-cherry and apricot) with recoveries in range of 86.6-107.5%. The GC-NPD results were confirmed by gas chromatography-mass spectrometry (GC-MS). The results demonstrated that with combination of highly interconnected 3D network structure and magnetism property of adsorbent, 3D-G-Fe3O4 aerogel exhibited exceptional extraction ability towards the OPPs. (C) 2016 Elsevier B.V. All rights reserved.
机译：在这项研究中，制备了磁性三维石墨烯纳米复合物（3D-G-Fe3O4），表征并用作从气体样品中的果汁样品中对八种有机磷农药（OPP）进行磁性固相萃取（MSPE）的有效纳米吸附剂。色谱-氮磷检测（GC-NPD）。通过扫描电子显微镜（SEM），傅立叶变换红外光谱（FT-IR）和振动样品磁法（VSM）对3D-G-Fe3O4的性质和形貌进行了表征。仔细研究和优化了影响萃取回收率的主要实验参数，包括萃取时间，吸附剂的量，样品溶液的pH，盐浓度和解吸条件。结果表明，线性浓度范围宽，测定系数在0.9973至0.9999之间。该方法的检出限（S / N = 3）和定量限（S / N = 10）分别为1.2到5.1 ng L-1和3.4-17.0 ng L-1。日内和日间RSD分别为2.6-5.1％和3.5-6.9％。该方法已成功用于果汁（苹果，橙子，葡萄，酸樱桃和杏子）中OPP的分析，回收率在86.6-107.5％之间。 GC-NPD结果通过气相色谱-质谱法（GC-MS）确认。结果表明，结合高度互连的3D网络结构和吸附剂的磁性，3D-G-Fe3O4气凝胶对OPP表现出优异的提取能力。 （C）2016 Elsevier B.V.保留所有权利。

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